Universal joint



J. C. KOPF.

UNIVERSAL JOINT.

APPUCAHON FILED NOV-20,1919.

1,343,728. Patented J 11110 15, 1920.

4 3 SHEETSSHEET l.

g/w/w ATTORNEY J. C. KOPF.

UNlVERSAL JOINT.

APPLICATION FILED NOV. 20, 1919.

1,343,728. Patenfd June 15, 1920.

- 3 SHEETS-SHEET 3- angles to Fig.1; 1

UNITED STATES .l-ATENT. OFFICE.

JOHNIC. KOPF, or BELLEVUE BOROUGH, PENNSYLVANIA.

UNIVERSAL JOINT,

weaves.

Application filed November 20, 1919. Serial No. 339,411.

To all whom it may concern: Be it known that 1, JOHN C. Korr, at cmzen of the United States, and resident of the borough of Bellevue, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Universal Joint, of which the followingis a specification;

The object of this invention is to provide prises two terminal members and 'an intermechate member successively pivoted on axes at right angles,the intermediate memberbeing formed in sections which are 001 lapsible for insertion and removal in one of the'terminal members and locked inns sembly by the pivot connection with the other terminal, member. The nature ofthe device, will be more fully understood from the following description, reference being had to the accompanying drawings, wherein: Figure 1' is aside view showing the joint straight in full lines and flexed upon one of; 7

its pivots in dotted lines;

ldig. an a side view looking at r ght i Fig. is across-section on the line 3-I3 ofFigl; v a

Fig. 4E isga cross-section on the line el-t of Fig. 1;

; Fig.5 isa longitudinalsection on the line 5+5 of Fig. 2; i

Figs. 6 and 7 are perspective views of the parts of' the intermediate member, disassembled; 4

Fig. 8 is aside view of' a terminal fork;

Fig. 9 is a side view' of the intermediate member, collapsed; V Fig. '10 is side view of the removable pivot pin; and i j i Fig. 11 is a side view of'the other term1- nal :merhber -Figs. 8 to 11 showing the parts of the joint ,in approximate relations for assenn blin Specification of Letters Patent. Pate t d J 15 1920 The numerals 1 and 2 indicate two shaft elements or the like, to one of which power is applied and through the joint transmitted to the other. The pivotal portions of these elements are herein. termed the terminal members of the universal joint. One of the terminal members is preferably a fork 3, and the other member a hub-end l, while the intermediate member 5 is preferably a frame-like part received between the arms of the fork and receivingin it the terminal member 1. v

i The arms of the forl: are formed with opposed openingsfi, in which cup bushings? are inserted from'the interior, these bushmgs having out-turned flanges 8 on their inner, open ends, which abut against the intwo'parts 9 and 9. These parts are rectangularly Ushaped, and formed to fit one into the other, in reversed relation. Eaoh'part has anend walllG or lO and two side walls or limbs 11 or 11 the limbs 11 being set in sufliciently from the extremities of the end wall 10 tobe received between the limbs 11. When thesections are assembled, the outer limbs 11 fit in the recesses beneath the projecting extremities of the end wall 10 abut-.

ting the shoulders 1O formed thereby while the ends of the inner limbs '11" abutv the inner surface of the end wall 10.

The limbs 11 and 11 are pierced by alined pivot-pin holes 12 and 12, which register when the parts are fitted together. These holes receive the end portions of a pivot pin 13, the intermediate portion ofwhich extends through the pivot hole 1% in the terminal member l, said hole being lined by a bushing 15. a

The end walls 10 and 10 of the sections of the intermediate member bear pivot trun nions 16, 16, the axes of which are at right angles to the pivot-pin holes 12 and} 12 Said trunnions pivot within the cup-bushings 7 in the fork member 3, when the joint is assembled. a r

The flanges 8 of the bushings lie between the fork and the ends of the intermediate member, thus locking the bushings against displacement in either (direction, and also serving as bearing bosses. Oilers .17 are screwed into tapped openings in the outer,

are transversely curved on arcs concentric with the centers of the trunnlons 16, 16.

This enables the parts of the intermediate member to be turned relatively to each other into and out of assembly. When turned at right angles, as shown in Fig. 9, they can be slipped past each other, or collapsed, each. pair of limbspassing at opposite sides of the end wall of the other section, in this way shortening the distance between the ends of the trunnions so that the intermediate member can be introduced into or removed from the fork and the trunnions inserted in or withdrawn from their bearings. In the as sembled condition the pin. is passing through the registering holes in the limbs locks the sections of the intermediate mem ber together and their trunnions against escape from the bearings.

One end of said pin 18 is provided with a kerf '19 or other toolereceiving' formation,

and the opposite end is externally screw threaded as indicatedat 20 to engage corresponding internal threads in the hole of one of the outer limbsll. Said end of the pin also has an internally screw-threaded socket 21,'the threads of which are of dif- 5 ferent pitch from the outside threads 20;

- From said socket extends avlongitudin'al internal lubricating channel 22, communicating with external channels 23, closedby the bushing 15. An oiler 24 has a st'em'25 threaded 'to engage the socket 21, and when this :oiler is screwed in with its shoulder tight against the limb 11, it acts as a lockscrew to prevent the pivot-pin coming loose. The screw end portion of the pin 13 is reduced to forma shoulder 13 which i abuts against the inner side of the adjacent limbs.

limb 11 thus acting as a positive stop'to prevent outward projection of the extremity of the pin, which would destroy the locking action of the oiler; The-holes 12, 12"" inthese two limbs 11, 11* are correspondingly smaller than the holes in the other two i the mechanic.

WVhat I claim as'new is: V i '1. universal ointfcomprislng two terminal members andan intermedlatemember'pivoted at right angles, characterized by the intermediate member comprising two parts, each having a pivot portion forengagement with one of the terminal members, which is a fork, said parts being collapsible so as to shorten the distance be tween said pivot portions whereby the intermediate member can be'inserted in and removed from the fork, and a removable pivot connection with the other terminal member which when in placeprevents collapsing of said parts and locks the whole in assembly.

7 2. A universal 'jointcomprising twoterminal members and an intermediate ..I ne1nber pivoted at right-angles," characterized by the intermediate member comprising two parts each having a pivot portion for connection with one of the terminal members, said parts fitting one inside ofthe other and being collapsible for insertion and removal insaid member and having registering pivot-pin holes in their overlapping portions at right. angles tosaid pivot portions, and a'removable pi'vot connection en gaging said holes and the other terminal member and locking said parts in assembly. 8; A universal joint comprising two terminal members and one intermediate member, the intermediate member comprising two substantially :U-shaped parts fitting together and each having a trunnion on its end to engage one ofthe terminal members, said parts be ng further provided on their hmbs wlth transversely curved meeting surfaces whereby they can be turned and sl pped past each other, said limbs having reglsterlng pivot-pin holes, and a remov able pivot connection "engaging said holes and the other terminal member.

a. In a universaljoint, the combination of a fork t'erminal member, a frame-like intermediate member comprising two substantially U-shaped parts fitting together and each having a pivot-portion at its end to engage the; fork, said parts being further provided on their limbs with transversely curved meeting surfaces whereby they can be'turned and slipped-pasteach othergsaid limbs having registering pivot-pin holes,

another terminal member inside said framelike intermediate member, and a removable pivot connectionengaging this terminal member and said holes.

7 5. In a universal joint,the combination a pivot portion to engage one of the ter'mi nal members, said parts fitting one inside of the otherand being collapsible for insertion and removal in said member and having registering pivot-pin holes at right angles to said pivot portions, a removable pivot-pin with oil ducts passing through said holes and the other terminal member,

its

said pivot-pin having an. external screw portion engaging threads in one of the parts and being further provided with a screw socket having threads of a different pitch, and an oiler having a stem threaded to engage said socket and lock the pin.

6. In a universal joint, the combination of a fork terminal member having opposed openings in its branches, an intermediate member comprising two fitting parts collapsible for insertion and removal and having trnnnions on their ends and transverse registering pivot-spin holes, another terminal member, a removable pivot-pin passing through this member and said registering holes, cup bushings in the openings of said fork member having flanges on their inner open ends disposed between the fork arms and the ends of the intermediate member, and oilers in said bushings.

7. A universal joint comprising two terminal members and an intermediate member pivoted at right angles, said intermediate member comprising two parts each having a pivot portion for connection with one of the terminal members, which is a fork, said parts overlapping each other and being adapted to be turned relatively to each other and then collapsed so as to shorten the distance between said pivot portions, for insertion and removal in the fork, and having abutting portions which prevent collapsing except asthe parts are so turned,

and being further provided with register ing pivot-pin holes in their overlapping portions, and a removable pivot connection engagmg said holes and the other termlnal member and locking said arts in assembly.

' J HN C. KOPF. 

